oj.uz

Submission #632488

# Submission time Handle Problem Language Result Execution time Memory
632488 2022-08-20T07:41:41 Z andrei_boaca Printed Circuit Board (CEOI12_circuit) C++14
35 / 100
 100 ms 9532 KB 
#include <bits/stdc++.h>

using namespace std;
typedef pair<int,int> pii;
typedef long long ll;
int n;
struct point
{
    int x,y,ang;
} v[100005],angle[100005];
bool comp(point a, point b)
{
    return a.y*b.x<a.x*b.y;
}
map<pii,int> nrm;
bool cmp(int a, int b)
{
    if(v[a].ang!=v[b].ang)
        return v[a].ang<v[b].ang;
    return v[a].y<v[b].y;
}
bool use[100005],spec[100005];
int aib[100005],times[100005];
int lsb(int x)
{
    return x&(-x);
}
void update(int poz,int val)
{
    for(int i=poz;i<=n;i+=lsb(i))
        aib[i]+=val;
}
int suma(int poz)
{
    int rez=0;
    for(int i=poz;i>=1;i-=lsb(i))
        rez+=aib[i];
    return rez;
}
int cur=0;
bool iseq(point a, point b)
{
    return a.x==b.x&&a.y==b.y;
}
ll aria(point A, point B)
{
    ll rez=1LL*A.x*B.y-1LL*A.y*B.x;
    rez=abs(rez);
    return rez;
}
bool intersect(point A, point B, point C)
{
    if(iseq(A,C)||iseq(B,C))
        return 0;
    if(A.ang>B.ang)
        swap(A,B);
    if(C.ang>=A.ang&&C.ang<=B.ang)
        if(aria(A,C)+aria(B,C)>=aria(A,B))
            return 1;
    return 0;
}
bool checkgood(int i)
{
    if(cur==0)
        return 1;
    point a=v[cur];
    int lft=cur-1;
    if(lft<1)
        lft=n;
    point b=v[lft];
    if(intersect(a,b,v[i]))
        return 0;
    int rgt=cur+1;
    if(rgt>n)
        rgt=1;
    b=v[rgt];
    if(intersect(a,b,v[i]))
        return 0;
    return 1;
}
int main()
{
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        int x,y;
        cin>>x>>y;
        v[i]={x,y,0};
        int cmmdc=__gcd(x,y);
        x/=cmmdc;
        y/=cmmdc;
        angle[i]={x,y,0};
    }
    sort(angle+1,angle+n+1,comp);
   // cout<<'\n';
    for(int i=1;i<=n;i++)
    {
        pii a={angle[i].x,angle[i].y};
        nrm[a]=i;
    }
    for(int i=1;i<=n;i++)
    {
        int cmmdc=__gcd(v[i].x,v[i].y);
        int xa=v[i].x/cmmdc,ya=v[i].y/cmmdc;
        v[i].ang=nrm[{xa,ya}];
    }
    vector<int> ind;
    for(int i=1;i<=n;i++)
        ind.push_back(i);
    sort(ind.begin(),ind.end(),cmp);
    vector<int> sol;
    int nr=0;
    for(int i:ind)
    {
        nr++;
        bool good=checkgood(i);
        if(good)
        {
            cur=i;
            sol.push_back(i);
        }
    }
    sort(sol.begin(),sol.end());
    cout<<sol.size()<<'\n';
    for(int i:sol)
        cout<<i<<' ';
    return 0;
}

Subtask #1
35.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 3 ms 596 KB Output is correct
4 Correct 4 ms 724 KB Output is correct
5 Incorrect 12 ms 1236 KB Output isn't correct
6 Incorrect 14 ms 1208 KB Output isn't correct
7 Incorrect 25 ms 2160 KB Output isn't correct
8 Incorrect 10 ms 972 KB Output isn't correct
9 Correct 8 ms 980 KB Output is correct
10 Incorrect 13 ms 1236 KB Output isn't correct
11 Incorrect 14 ms 1376 KB Output isn't correct
12 Correct 20 ms 2132 KB Output is correct
13 Incorrect 40 ms 3116 KB Output isn't correct
14 Correct 43 ms 4116 KB Output is correct
15 Correct 52 ms 4896 KB Output is correct
16 Execution timed out 107 ms 9524 KB Time limit exceeded
17 Execution timed out 149 ms 9532 KB Time limit exceeded
18 Runtime error 59 ms 5068 KB Execution killed with signal 11
19 Runtime error 63 ms 5068 KB Execution killed with signal 11
20 Execution timed out 125 ms 8056 KB Time limit exceeded